Oil tube dust cap



1949- B. E. EYNON EI'AL 2,484,617

OIL TUBE DUST GAP Filed Nov. 14, 1945 Fiyn; Y F11 6 IN VENTORS BLA/NE E. E YNON DONALD GUSTAFSON 64mm. W

A TTOR/VEY Patented Oct. 11, 1949 UNITED STATES PTNT GFFICE OIL TUBE DUST CAP ship Application November 14, 1945, Serial No. 628,416

Claims.

This invention relates to motor accessories, and has particular reference to a dust cap for oil tubes so that dust, acid bearing materials, or other deleterious elements are prevented from enterin the bearing cavity of the motor.

An object of the invention is the provision of a device of the character indicated, which is simple in construction, inexpensive to manufacture, and efiicient in use.

Another object of the invention is the provision of a dust cap which is readily adaptable for use with conventional flared oil tubes on electric motors, and the like.

Another object of the invention is the provision of a dust cap which requires a minimum of space for mounting and use, which makes it suitable for mounting close to the frame or end bell on small motors.

Another object of the invention is the provision of a dust cap for a motor oil tube, which is easily installed and replaced in the event of damage.

Another object of the invention is the provision of a dust cap for an oil tube, which may readily be lifted with the spout of an oil can or other instrument, and which will automatically return to closed position after it has been lifted.

The foregoing and other objects and advantages of the invention will become more apparent as the description proceeds, reference being made from time to time to the accompanying drawings forming part of the within disclosure, in which drawings:

Fig. l is a side elevational view of our improved dust cap fitted on a conventional flared oil tube such as is used to oil the bearings of an electric motor, and the like.

Fig. 2 is a rear view of the device illustrated in Fig. 1.

Fig. 3 is a plan View of the device illustrated in Figs. 1 and 2.

Fig. 4 is an enlarged perspective view of the unmounted cap without the spring.

Fig. 5 is an elevational view of one end of an electric motor equipped with a flared oil tube and our improved dust cap, and illustrating the manner in which the cap may be lifted with a spout of an oil can.

Fig. 6 is a view similar to Fig. 5, but showing the cap in open position during the oiling operation.

Referring now more particularly to the drawings, it will be understood that in the embodiment herein disclosed, our improved dust cap (Fig. 5) consists preferably of a length of spring brass which is formed with a closure portion 8, a curved shank 9, and a collar portion In, the latter bein adapted to be fitted around the conventional oil tube ll of a motor 12. The collar 2 Il! may be bent to fit different size tubes Within a given range, so that one size cap will suffice for different motors. The closure portion 8 is provided with a lip iii, which enables the user to lift the cap with the spout of an oil can or other instrument, as shown in Fig-s. 5 and 6.

A compression spring id is mounted about the tube 6 i and abuts the flare it of the tube It and the upper edge of the collar portion I0, and serves to hold the cap normally in closed position as shown in Fig. 5.

It is apparent from the disclosure that because of the particular construction and arrangement of the cap, and because of its reciprocatory movement, it is possible to mount the oil tube close to the frame or end bell of the motor or in any other comparatively restricted space.

Having described our invention, What we claim and desire to secure by Letters Patent is:

1. An oil tube dust cap comprising a length of material having a flat closure portion, a curved shank and a collar portion arranged to encircle and slidably engage an oil tube.

2. The combination with an oil tube having a flared end, of a cap comprising a length of material formed with a flat closure portion adapted to cover the flare, .a curved shank, and a collar portion encircling and slidably engaging the tube.

.3. The combination defined in claim 2, including a compression spring positioned between and abutting the said flare and the upper edge of said collar position.

4. In combination with the oil tube of a motor, a dust cap comprising a length of material having a closure portion adapted to seal the end of said tube, said closure portion having a lip overhanging the edge of the tube, a shank, and a collar portion encircling and slidably engaging the tube, and a compression spring positioned about said tube between the end thereof and said collar portion.

5. The combination defined in claim 4, including means at the end of said tube abutting one end of said compression spring.

BLAINE EL EYNON. DONALD GUS'I'AFSON.

Name Date Downey Aug. 29, 1916 FOREIGN PATENTS Country Date Great Britain (1914) Oct. 31, 1914 Number Number 

